/*
 * jQuery UI Effects Fold 1.6
 *
 * Copyright (c) 2008 AUTHORS.txt (http://ui.jquery.com/about)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI/Effects/Fold
 *
 * Depends:
 *	effects.core.js
 */
(function($) {

    $.effects.fold = function(o) {

        return this.queue(function() {

            // Create element
            var el = $(this), props = ['position', 'top', 'left'];

            // Set options
            var mode = $.effects.setMode(el, o.options.mode || 'hide'); // Set Mode
            var size = o.options.size || 15; // Default fold size
            var horizFirst = !(!o.options.horizFirst); // Ensure a boolean value

            // Adjust
            $.effects.save(el, props);
            el.show(); // Save & Show
            var wrapper = $.effects.createWrapper(el).css({overflow: 'hidden'}); // Create Wrapper
            var widthFirst = ((mode == 'show') != horizFirst);
            var ref = widthFirst ? ['width', 'height'] : ['height', 'width'];
            var distance = widthFirst ? [wrapper.width(), wrapper.height()] : [wrapper.height(), wrapper.width()];
            var percent = /([0-9]+)%/.exec(size);
            if (percent)
                size = parseInt(percent[1]) / 100 * distance[mode == 'hide' ? 0 : 1];
            if (mode == 'show')
                wrapper.css(horizFirst ? {height: 0, width: size} : {height: size, width: 0}); // Shift

            // Animation
            var animation1 = {}, animation2 = {};
            animation1[ref[0]] = mode == 'show' ? distance[0] : size;
            animation2[ref[1]] = mode == 'show' ? distance[1] : 0;

            // Animate
            wrapper.animate(animation1, o.duration / 2, o.options.easing)
                    .animate(animation2, o.duration / 2, o.options.easing, function() {
                if (mode == 'hide')
                    el.hide(); // Hide
                $.effects.restore(el, props);
                $.effects.removeWrapper(el); // Restore
                if (o.callback)
                    o.callback.apply(el[0], arguments); // Callback
                el.dequeue();
            });

        });

    };

})(jQuery);
